| ERA5再分析数据适用性初步评估 |
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| 引用本文： | 孟宪贵,郭俊建,韩永清.ERA5再分析数据适用性初步评估[J].山东气象,2018,38(1):91-99. |
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| 作者姓名： | 孟宪贵 郭俊建 韩永清 |
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| 作者单位： | 山东省气象台，山东 济南 250031 |
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| 基金项目： | 山东省气象科学研究所数值天气预报应用技术开放研究基金项目（SDQXKF2014M07） |
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| 摘 要： | 利用山东省及周边地区10个站点的地面和高空观测资料对ERA5再分析资料的适用性进行了初步评估。结果表明：再分析的海平面气压和2 m温度与实况资料的相关性明显优于2 m相对湿度和10 m风场；高空温度和相对湿度在对流层中低层的适用性要好于高层，而位势高度和风场在中高层适用性较好；海平面气压再分析与实况的相关有着最明显的季节变化，2 m温度、2 m相对湿度和10 m风速则在部分站点有较明显的季节变化，而10 m风向的相关系数更多地表现出站点之间的差异，高空要素的适用性，季节和区域差异不明显。另外，对比发现，ERA5的适用性总体上要优于ERA-Interim再分析资料，地面和对流层低层的相对湿度、风场提高更为明显。
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| 关 键 词： | ERA5再分析数据 相关系数 评估 对比 |
| 收稿时间： | 2017/11/28 0:00:00 |
| 修稿时间： | 2018/1/6 0:00:00 |
Preliminarily assessment of ERA5 reanalysis data |
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| MENG Xiangui,GUO Junjian,HAN Yongqing.Preliminarily assessment of ERA5 reanalysis data[J].Journal of Shandong Meteorology,2018,38(1):91-99. |
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| Authors: | MENG Xiangui GUO Junjian HAN Yongqing |
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| Institution: | Shandong Meteorological Observatory, Jinan 250031, China |
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| Abstract: | The ERA5 reanalysis data is introduced firstly, then the conventional observation data from 10 meteorological stations in Shandong province and its surrounding areas are compared with ERA5 reanalysis for the verification preliminarily. The results are as follows. Mean sea level pressure and 2 m temperature have higher correlation coefficients than 2 m relative humidity and 10 m wind between ERA5 reanalysis and observation. Temperature and relative humidity have better evaluation applicability in the middle and lower level than the upper level troposphere, meanwhile geopotential height and wind agree well with the observed data in the middle and upper level of troposphere. The correlation of mean sea level pressure has the most significant seasonal variation, while 2 m temperature,2 m relative humidity and 10 m wind speed have more significant seasonal variation at partial stations. The correlation of 10 m wind direction has obvious regional differences. The evaluation applicability of upper level elements from ERA5 doesn''t have significant seasonal variation and regional differences. ERA5 reanalysis has better evaluation applicability than ERA-Interim reanalysis based on comparisons, especially relative humidity and wind have more improvement in surface and low level of troposphere. |
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| Keywords: | ERA5 reanalysis data correlation coefficient assessment comparison |
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